Adjustable three-point hitch

Abstract

An adjustable three-point hitch for allowing a user to hydraulically manipulate the rotational position of an implement with respect to a longitudinal axis of the tractor. The inventive device includes a support frame attachable to a front portion of a tractor frame, a pair of lift arms pivotally attached to the support frame, a pair of lifting cylinders fluidly connected in parallel and attached between the support frame and the pair of lift arms, a center arm pivotally attached to the support frame, a tilting arm having a slot pivotally attached to one of the lift arms, an engaging member extending from the opposing lift arm within the slot, and a tilting cylinder attached between the support frame and the tilting arm for manipulating the tilting arm. To adjust the position of the lift arms with respect to one another, the tilting cylinder is extended or retracted until the desired position is reached.

I claim: 
     
       1. An adjustable three-point hitch comprising: a support frame attachable to a frame of a tractor;   a first lift arm and a second lift arm pivotally attached to said support frame;   a lifting means attached between said support frame and said first lift arm and said second lift arm for elevating and descending said first lift arm and said second lift arm;   a tilting arm having a first end and a second end, said first end pivotally attached to said first lift arm and said second end slidably attached to said second lift arm; and   a tilting means attached between said tilting arm and said support frame for manipulating said tilting arm.   
     
     
       2. The adjustable three-point hitch of claim 1, wherein: said second end of said tilting arm includes an opening; and   a first member extends from said second lift arm into said opening, wherein said first member is slidably positioned within said opening along an axis.   
     
     
       3. The adjustable three-point hitch of claim 2, wherein said axis is substantially horizontal. 
     
     
       4. The adjustable three-point hitch of claim 3, wherein said first end of said tilting arm is closer to said support frame than said second end. 
     
     
       5. The adjustable three-point hitch of claim 4, wherein said lifting means comprises a pair of hydraulic cylinders. 
     
     
       6. The adjustable three-point hitch of claim 5, wherein said hydraulic cylinders are fluidly connected parallel to one another. 
     
     
       7. The adjustable three-point hitch of claim 6, wherein said opening is rectangular shaped. 
     
     
       8. The adjustable three-point hitch of claim 6, wherein said opening is a slot. 
     
     
       9. The adjustable three-point hitch of claim 8, wherein said slot has rounded ends for snugly receiving said first member. 
     
     
       10. An adjustable three-point hitch comprising: a first lift arm and a second lift;   a lifting means attached to said first lift arm and said second lift arm for elevating and descending said first lift arm and said second lift arm;   a tilting arm having a first end and a second end, said first end pivotally attached to said first lift arm and said second end slidably attached to said second lift arm; and   a tilting means attached to said tilting arm for manipulating said tilting arm.   
     
     
       11. The adjustable three-point hitch of claim 10, wherein: said second end of said tilting arm includes an opening; and   a first member extends from said second lift arm into said opening, wherein said first member is slidably positioned within said opening along an axis.   
     
     
       12. The adjustable three-point hitch of claim 11, wherein said axis is substantially horizontal. 
     
     
       13. The adjustable three-point hitch of claim 12, wherein said lifting means comprises a pair of hydraulic cylinders. 
     
     
       14. The adjustable three-point hitch of claim 13, wherein said hydraulic cylinders are fluidly connected parallel to one another. 
     
     
       15. The adjustable three-point hitch of claim 14, wherein said opening is rectangular shaped. 
     
     
       16. The adjustable three-point hitch of claim 14, wherein said opening is a slot. 
     
     
       17. The adjustable three-point hitch of claim 16, wherein said slot has rounded ends for snugly receiving said first member.